[Bug tree-optimization/68550] [6 Regression] ICE: verify_gimple failed Error: missing PHI def

[spop at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68550

--- Comment #4 from Sebastian Pop <spop at gcc dot gnu.org> ---
Author: spop
Date: Wed Dec  2 20:40:17 2015
New Revision: 231206

URL: https://gcc.gnu.org/viewcvs?rev=231206&root=gcc&view=rev
Log:
fix PR68550: do not handle ISL loop peeled statements

In case ISL did some loop peeling, like this:

  S_8(0);
  for (int c1 = 1; c1 <= 5; c1 += 1) {
    S_8(c1);
  }
  S_8(6);

we should not copy loop-phi nodes in S_8(0) or in S_8(6).

        PR tree-optimization/68550
        * graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Add dump.
        (copy_bb_and_scalar_dependences): Do not code generate loop peeled
        statements.

        * gfortran.dg/graphite/pr68550-1.f90: New.
        * gfortran.dg/graphite/pr68550-2.f90: New.

Added:
    trunk/gcc/testsuite/gfortran.dg/graphite/pr68550-1.f90
    trunk/gcc/testsuite/gfortran.dg/graphite/pr68550-2.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/graphite-isl-ast-to-gimple.c
    trunk/gcc/testsuite/ChangeLog